d8aac21e2d
Adds @axe-core/playwright with a shared fixture providing an `axe` helper. New a11y.spec.ts runs WCAG 2.1 AA checks on signin, dashboard, timeline, allocations, resources, and projects pages. Currently reports violations as warnings — upgrade to hard failures after fixes. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>